Physically, eyes and build.

But once I start talking to a person it's their mannerisms that I notice most. Do they look me in the eye? Do they stand close enough? Do they stand too close? Are they touchy-feely?

I've been creeped out by men other women swoon over, and attracted to physically unattractive men, based on their mannerisms.

Oh - and smell! That's a big one. I get really grossed out by men who wear too much cologne, or scents I don't like. I'd rather a man didn't wear cologne. But I just love the smell of soap, shaving cream, and deodorant.